The Cosmos

The Cosmos enters the battlefield tapped.
As you play The Cosmos, discard 1 land card or sacrifice it.
If The Cosmos were to leave the battlefield, you
may put it into its owner's library eighth from
the top.
{t}: Add one many of any color.
{5}: Sacrifice The Cosmos and search your library
for any celestial card not named The Cosmos,
reveal it, and put it into your hand, then shuffle
your library.